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ST7260 数据表(PDF) 87 Page - STMicroelectronics |
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ST7260 数据表(HTML) 87 Page - STMicroelectronics |
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87 / 117 page  ST7260 87/117 13.2 ABSOLUTE MAXIMUM RATINGS Stresses above those listed as “absolute maxi- mum ratings” may cause permanent damage to the device. This is a stress rating only and func- tional operation of the device under these condi- tions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. 13.2.1 Voltage Characteristics 13.2.2 Current Characteristics Notes: 1. Directly connecting the RESET and I/O pins to VDD or VSS could damage the device if an unintentional internal reset is generated or an unexpected change of the I/O configuration occurs (for example, due to a corrupted program counter). To guarantee safe operation, this connection has to be done through a pull-up or pull-down resistor (typical: 4.7k Ω for RESET, 10k Ω for I/Os). Unused I/O pins must be tied in the same way to V DD or VSS according to their reset configuration. 2. IINJ(PIN) must never be exceeded. This is implicitly insured if VIN maximum is respected. If VIN maximum cannot be respected, the injection current must be limited externally to the IINJ(PIN) value. A positive injection is induced by VIN>VDD while a negative injection is induced by VIN<VSS. For true open-drain pads, there is no positive injection current, and the corresponding VIN maximum must always be respected 3. All power (VDD) and ground (VSS) lines must always be connected to the external supply. 4. When several inputs are submitted to a current injection, the maximum ΣI INJ(PIN) is the absolute sum of the positive and negative injected currents (instantaneous values). These results are based on characterization with ΣI INJ(PIN) maxi- mum current injection on four I/O port pins of the device. 5. True open drain I/O port pins do not accept positive injection. 13.2.3 Thermal Characteristics Symbol Ratings Maximum value Unit VDD - VSS Supply voltage 6.0 V VIN 1) & 2) Input voltage on true open drain pins VSS-0.3 to 6.0 Input voltage on any other pin VSS-0.3 to VDD+0.3 VESD(HBM) Electro-static discharge voltage (Human Body Model) See “Absolute Maximum Ratings (Electrical Sensitivity)” on page 94. Symbol Ratings Maximum value Unit IVDD Total current into VDD power lines (source) 3) 80 mA IVSS Total current out of VSS ground lines (sink) 3) 80 IIO Output current sunk by any standard I/O and control pin 25 Output current sunk by any high sink I/O pin 50 Output current source by any I/Os and control pin - 25 IINJ(PIN) 2) Injected current on VPP pin ± 5 Injected current on RESET pin ± 5 Injected current on OSCIN and OSCOUT pins ± 5 Injected current on any other pin 4) & 5) ± 5 ΣI INJ(PIN) 2) Total injected current (sum of all I/O and control pins) 4) ± 20 IINJ(PIN) 2) Negative injected current to PB0(10mA)/AIN0 pin - 80 µA Symbol Ratings Value Unit TSTG Storage temperature range -65 to +150 °C TJ Maximum junction temperature: See section 14.2 on page 105 for TJmax |
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